Treadmill



FIG. 1 is a perspective view of a treadmill showing my new design thereof;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken line showing of portions of the treadmill depict environment and forms no part of the claim. 

CLAIM The ornamental design for a treadmill, as shown and described. 